10 Common Science Myths

<b>10.</b><br /><strong>The Facts:</strong> Evolution is the change in the inherited characteristics of biological populations over successive generations. The evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.<br />
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<b>9.</b><br /><strong>The Facts:</strong> Humans and other animals exposed to vacuum lose consciousness after a few seconds and die of hypoxia within minutes, but the symptoms are not nearly as graphic as the imagery in the public media suggests. Blood and other body fluids do boil when their pressure drops, the vapor pressure of water at body temperature. This condition is called ebullism. The steam may bloat the body to twice its normal size and slow circulation, but tissues are elastic and porous enough to prevent rupture.<br />
Info src: <a href="http://en.wikipedia.org/wiki/Effects_of_space_on_the_human_body#The_vacuum_of_space" target=_blank>http://www.wikipedia.org/</a><br />
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<b>8.</b><br /><strong>The Facts:</strong> Sirius is the brightest star in the night sky. With a visual apparent magnitude of &#8722;1.46, it is almost twice as bright as Canopus, the next brightest star. Polaris is #46 on the list of brightest stars in the sky.<br />
Info src: <a href="http://en.wikipedia.org/wiki/List_of_brightest_stars" target=_blank>http://www.wikipedia.org/</a><br />
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<b>7.</b><br /><strong>The Facts:</strong> There was no significant difference in the number of bacteria collected from 2 seconds exposure as there was from 6 seconds exposure. The moisture, surface geometry and the location the food item was dropped on did, however, affect the number of bacteria.<br />
Info src: <a href="http://en.wikipedia.org/wiki/Five-second_rule" target=_blank>http://www.wikipedia.org/</a><br />
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<b>6.</b><br /><strong>The Facts:</strong> The far side of the Moon, previously called the "dark" side of the Moon, is the hemisphere of the Moon that always faces away from Earth. The far side's terrain is rugged, with a multitude of impact craters and relatively few flat lunar maria. It has one of the largest craters in the Solar System, the South Pole-Aitken basin.<br />
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<b>5.</b><br /><strong>The Facts:</strong> Studies show that brain cells can grow back. in 1998, scientists at the Sweden and the Salk Institute in La Jolla, California discovered that brain cells in mature humans can regenerate. <br />
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<b>4.</b><br /><strong>The Facts:</strong> A penny dropped from the Empire State Building will not kill a person or crack the sidewalk. <br />
Info src: <a href="http://en.wikipedia.org/wiki/List_of_common_misconceptions" target=_blank>http://www.wikipedia.org/</a><br />
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<b>3.</b><br /><strong>The Facts:</strong> Meteorites are not necessarily hot when they reach the Earth. In fact, many meteorites are found with frost on them. As they enter the atmosphere, having been warmed only by the sun, meteors have a temperature below freezing. The intense heat produced during passage through the upper atmosphere at very high speed then melts a meteor's outside layer, but molten material is blown off and the interior does not have time to warm appreciably. <br />
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<b>2.</b><br />
<strong>The Facts: </strong> There is no reason that lightning would not be able to strike the same place twice; if there is a thunderstorm in a given area, then objects and places which are more prominent or conductive (and therefore minimize distance) are more likely to be struck. For instance, lightning strikes the Empire State Building in New York City about 100 times per year. <br />
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<b>1.</b><br />
<strong>The Facts: </strong>A common conception about spacecraft orbiting the earth is that they are operating in a gravity free environment. Although there is a way of making sense of this within the physics of Einstein's general relativity, within Newtonian physics, this is technically inaccurate . <br />
Info src: <a href="http://en.wikipedia.org/wiki/Weightlessness#A_common_misconception" target=_blank>http://www.wikipedia.org/</a><br />
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